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<br />Critical Area. <br /> <br />. <br /> <br />...... <br />\.0 <br />o <br />....... <br /> <br />One of the Great'Lakes <br />DemonstraUon Progl'fJm projects, the <br />Bleck Creek project In Indiana <br />developed a procedure for targeUng <br />~p~moota~nroc~~/are~- <br />those areas that contribute most to the <br />water quality problem. The RCWP <br />adopted this valuab/~ lesson to <br />Increese the water quality benefft per <br />dollar spent. <br /> <br />Wooded antf:grassed areas <br />adjacent to w,atercourses <br />protect wate~ quality. <br /> <br />-'"I <br /> <br />. <br />, .4. <br /> <br />Nebraska will monitor after treatment to compare with pre- <br />treatment data. South Dakota has measured fish, algall, and <br />zooplankton populations to establish water quality indicatlilrs. In <br />the Vermont RCWP, preliminary analysis of biological data sup- <br />ports conclusions different from those developed through <br />analysis of chemical data. The apparently conflicting results are <br />somewhat confusing, but should not be interpreted as prpofthat <br />either approach is better. The. relationship between chemical <br />and biological monitoring is a research issue beyond the scope <br />of the RCWP. <br /> <br />o A data analysis strategy for linking water quality to the land use <br />record should be planned early in the project. The, strategy <br />should address the stated water quality goalS and objectives <br />directly, rigorously, and specifically. Land treatment monitoring <br />should track BMP implementation quantitatively, by: area <br />covered and including cost-shared and non-cost-sharedprac- <br />tices. <br /> <br />II Flexibility may help encourage participation. Where the objective is to <br />improve or protect water quality, BMP contracting rules should be structured <br />to maximize the potential for controlling pollution in critical areas. For ex- <br />ample, partial farm plans that address a substantial portion of the water <br />quality problem may be preferable to playing a waiting game for complete <br />farm plans. Another possibility is phased implementation to compensate for <br />farm economics, producer uncertainty, or other impediments to pollution <br />control. <br /> <br />II Modeling techniques can be used to rank pollutant sourclls and es" <br />tlmate the land treatment needed to restore or protect water \lse. Water <br />qualitymodels (AGNPS and CREAMS) have been found useful for planning <br />and evaluating activities such as identifying critical areas and selllcting land <br />treatment strategies (South Dakota, Minnesota, lilinois, Vermont): Modeling <br /> <br /> <br />10 <br /> <br />'; <br />j <br />;j <br /> <br />4 _,':'" o.lt_~, <br /> <br />:,' ;j <br /> <br />:':<:~ <br />-,,~,"""'." ""v,_'~ <br />